Determination of nitrate and nitrite in meat products by using a nitrate ion-selective electrode

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Abstract
A procedure for the determination of nitrate and nitrite in meat products by a direct potentiometric method with a nitrate ion-selective electrode is presented. The soluble nitrate and nitrite were extracted from the meat products with a Soxhlet extractor using borax buffer solution (pH 9). The effect of pH on the recovery of nitrite and nitrate was studied. Results obtained by the proposed method were compared with those obtained by recommended spectrophotometric methods. Storage of samples before analysis was also studied.

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